John lundgken



Patented Aug. 2., 187.0. l

JpLUNDGREN. Gas *Heater` Y UNITED STATES 'ATENT Erica.

JOHN LUNDGREN, OF NEW-YORK, N. Y.

GAS-HEATER.

` Specification forming part of `Letters Patent No. 106,070, dated August 2, 1870.

To all whom it may concern:

Be it known that I, JOHN LUNDe-REN, of New York, in the county of New York and State of New York, have invented a'new and valuable Improvement in Gas-Stoves; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation o f the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure l of the drawings is a central vertical section of my invention. Fig. 2 is a plan view of the furnace with top removed. Fig. 3 is a view showing arrangement of the burners. Fig. 4 is an enlarged sectional view of the corrugated pipes. Fig. 5 represents a plan view of the upper plate ot' the cast-iron base.

My invention relates to 4gas-stoves; and it consists mainly in the construction and novel arrangement of the flues through which the products of combustion pass, the walls thereof being corrugated vertically to' present a larger radiating-surface, and so arranged as to be readily heated by the gas-dame.

The letter A of the drawings designates a cast-iron base, provided with bottom a' and top b. Openings are made in the side and bottom ot' this chamber for the admission of air. Air-openings c are also made in the top plate b, also openings d for the passage of the burners.

B represents the gas-pipe, attached to the I central bowl, e, from which radiate the pipes g g to feed the burners h h.

C represents a corrugated cast-iron cylinder Whose lower circumference fits Within a liange formed varound the opening d. Airis extending outward from the upper part of its wall, whereby it is supported on the upper It is also corrugated,

but in such a manner that there will be afree circulation allowed between its wall and that of the cylinder O. t

Resting upon the top of the cylinder O,and extending' upward to the top of the stove, is the corrugated sheet-iron vcylinder E. Its upper end is held in place by means of a ange,

e, formed around the openin g fin the plate G. This flange projects downward to receive the end ot' the corrugated cylinder.

H designates a smaller corrugated tube, tapering downward, and having its lower end inserted into the pot D. At its upper end it approaches the wall of the cylinder E. The heated air and products of combustion pass off mainly through the tapering iiue H, being guided thereto by the fluesformed by the dit'- ferent tubes. The combustion ol' the gases in the chamber e heats directly the pot D, and at the same time the heated products of combustion pass upward through the line s into the flue t. The air in the lower part of the pot D becomes intensely heated Aby the action of the ame below it, and thence rises vertically through the ilue H. Air is supplied to thepot D from the iue t, the hot air which rises into this iue from the chamber c being tempered by the admission ot' cool air at the point z.

K represents the outer cylinder ot' the stove,

which forms a hotair chamber about the corrugated pipes above described. Air is admit- 4ted into this chamber through the openings c The number of burners will determine the number ot corrugated pipes M within the chamber K. With a single burner one central pipe may be employed. In the example taken for illustration in the drawings four are used, arranged at equal distances from center or axial line Vot' the stove. The walls of the tlues being corrugated, a greater amount ot"` heat is radiated therefrom, andthe irregular nature of the corrugations allows the Walls vto be brought in contactwith each other at certain-points without obstructing the passage of the gases between them. Each gas-cup 7c is connected to the central bowl, as shown. from under the edge ot' the burner-plate h, which is corrugated and bolted to the cup k.

' What I claim as my invention, and desire to secure by Letters Patent, is

l. In combination with the hot-air cylinder K of a gas-stove, one or more corrugated radiators, M, consisting each of the corrugated The gas escapesl tubes C E H, and the heater-pot D, having In testimony that I claim the above I have corrugated wail, when constructed and ari vhereunto subscribed my name in the presence ranged to operate as and for the purposes speciof two Witnesses. fied.

2. In the radiator M of a. gas-stove, the m- JOHN LUNDGREN. rangement of the generating-chamber c', heating-pot D, ues s t H, and openings z df, as Witnesses: shown and described. GEO. Gr. SICKLES,

3. The gas-cup k, in combination with the HENRY ALBER. Corrugated burner-plate h, as specified. 

